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When chronic stress activates these neurons, behavioral problems like loss of pleasure, depression result

January 24, 2023

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Now scientists have evidence that a group of neurons in a bow-shaped portion of the brain become hyperactive after chronic exposure to stress. When these POMC neurons become super active, these sort of behavioral problems result and when scientists reduce their activity, it reduces the behaviors, they report in the journal Molecular Psychiatry.

Scientists at the Medical College of Georgia at Augusta University looked in the hypothalamus, key to functions like releasing hormones and regulating hunger, thirst, mood, sex drive and sleep, at a population of neurons called the proopiomelanocortin, or POMC, neurons, in response to 10 days of chronic, unpredictable stress.

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